Has anyone ever insultingly told you that you have the memory of a goldfish?

I hope you thanked them for the complement.


There’s this silly notion floating around that goldfish are creatures of very little brain power – they don’t ever get bored because every three seconds they forget everything and they aren’t really capable of intelligent behavior.

Nothing could be further from the truth!

And today we are going to show you the hard-core, no-nonsense scientific PROOF that goldfish are smarter than you think!

Keep reading to get the scoop.

Researching into Goldfish Memory Spans

A researcher offers his opinion regarding the stereotype:

“A lot of people have the image of a goldfish with a three-second memory – and that’s not the case at all. There is a lot of evidence now that fish are no dumber than birds or many mammals – and in many cases they are just as intelligent. They can learn their way around mazes, they can learn to recognise other fish, and they can remember which individuals are better competitors.” – Dr. Mike Webster (source)

This is backed up by the facts.

Take, for example, a 15 year old student named Rory from Australia who did a simple experiment to test goldfish memory capabilities.

“I decided to get a bit of red Lego and just feed them next to that. Every day I’d put it in and sprinkle food around it. At first they were a bit scared of it, a bit wary, but by the end of the three weeks, they were actually almost coming before I put the food in.” Rory told ABC News

The boy then waited nearly a week before putting the red Lego back in again.

“They remembered perfectly well. They actually had a time faster than the average of the three feeds before I left.”

This proved that the training not only stuck with the goldfish, but they could call it to mind at a later date – far beyond three seconds ūüėČ

But we’re getting started:

Take, for instance, the findings of studies at Plymouth University that show how goldfish remembered things for 3 months and can even tell time! (Source)

Their fish needed to nudge a lever in order to get food.

The researchers then made it so the lever only worked for one hour every day.

Guess what?

Those goldfish learned to only pressed the lever in the right time frame.  At that feeding time, they even hovered around the lever in anticipation!

But if you STILL are in doubt…

Just listen to this last example:

Researchers in Israel trained some young fish for one month to come to food at the sound of a bell.

After that…

… They released the fish into the sea.

Now get this:

5 months later they played the sound over speakers.

And the fish all came swimming back!

Chances are, the Memory of a Goldfish is FAR longer than 5¬†months…

All of the times in those tests were set as the goal. ¬†Finding out when the fish actually forgot something wasn’t part of the test.

This means goldfish can possibly remember things for even longer.

For example:

As you may know, the carp is the granddaddy of the goldfish.


Goldfish are really modified carp, which look different on the outside but haven’t changed much on the inside (aside from perhaps more compressed organs in fancy goldfish, which makes them more sensitive when it comes to diet.)

Interestingly enough, carps that were caught on the hooks of a fishing rod avoided lures for at least a year!

So, exactly how long is a goldfish memory?

We don’t know 100% for sure…

It hasn’t been tested for long enough to find when goldfish actually forget something.

But judging by the evidence we’ve looked at, it’s safe to say they have as good a memory as most other small pets, which is at least several months if not YEARS.

Hopefully this article brings to light the nail in the coffin for this 3 second goldfish memory fallacy.

Key Takeaways

Things really change when you realize a goldfish memory may span MONTHS – not seconds.

Most who keep goldfish discover their pet is very quick to catch on where the food comes on, sometimes even being trained to beg at one side of the aquarium!

Dr. Culum Brown has studied fish behavior for over a decade and maintains that fish are intelligent creatures who learn the lifelong skills of avoiding predators and foraging for food.

He has this to say about whether or not it is important to make their habitat more interesting.

“Definitely – I think the more complicated you make your fish tank, the happier your fish is gonna be.” ¬†In fact, the best thing to do is to keep changing it around, so make it interesting for them. You’ll find that if you do that, your goldfish will be much more active and much happier in general.”

I used to be the person who only had bare bottom tanks with minimal decor because I was more worried about removing every speck of poop than my fish’s natural stimulation.

I’ve since changed my tune.

Now I strive to make sure my tanks mimic a natural environment, giving the fish lots if interesting places to explore and fun things to do.

For starters:

Take substrate.

Foraging behavior is an integral part of their natural daily patterns.

Take away the substrate, and that takes away a lot of stimulation that they would have in the wild.

Instead of obsessing about waste, I accepted it as a natural part of the mini ecosystem I call an aquarium.

Which brings me to my next point:

Adding live plants help mimic a natural environment…

… And gives the fish something fun to swim around.

Plus, it probably helps them feel more at home.

The best part?

Live plants use fish waste for nutrients!

The two work together.

Those two things – natural substrate and real plants – are HUGE strides towards a more stimulating fish tank.

But Don’t Goldfish Have Tiny Brains?

Fun fact:

A fish’s brain is 380,000 times smaller than the brain of a human baby.

So there’s no denying it is tiny.

It is true that they have small brains, but only in comparison to larger living things.

Their brain is sized in proportion to the rest of them, which is just as small in comparison to a person.

The bottom line?

Small does not mean stupid!

There are plenty of other animals, such as mice, birds and reptiles which have the ability to retain information for extended lengths of time.

Now I want to Hear from You:

Are you surprised to learn the mental capabilities of the world’s most popular ¬†finned friend?

I hope you are excited to know the TRUTH about the three-second goldfish memory.

Maybe you have experience in teaching your goldfish to remember something.


Either way, leave your comment below to let me know what you think!